Use Super Magnets 3/4 in. Neodymium Rare-Earth Magnet Discs (3 per Pack) for a wide variety of temporary fastening jobs. These ring-shaped magnets are made of neodymium and provide 5 lb. of maximum pull.

Love these magnets and the price is right!

These magnets do hold together very well. Read the package though, they're brittle and can shatter like glass if abused. Slide them apart and don't drop them and they should work well for whatever unique use you find for them.